Sulfur Encapsulated in Graphitic Carbon Nanocages for High‐Rate and Long‐Cycle Lithium–Sulfur Batteries

Hybrid sp2 carbon with a graphene backbone and graphitic carbon nanocages (G-GCNs) is demonstrated as an ideal host for sulfur in Li–S batteries, because it serves as highly efficient electrochemical nanoreactors as well as polysulfides reservoirs. The as-obtained S/(G-GCNs) with high S content exhibits superior high-rate capability (765 mA h g−1 at 5 C) and long-cycle life over 1000 cycles.